Locked nut



Feb. 27, 1934.

A. J. ROMEIS ET AL 1,948,830

LOCKED NUT Filed July 12, 1932 2 Sheets-Sheet l Feb. 27, 1934. A. J. ROMEIS ET AL LOCKED NUT Filed July 12. 1932 2 Sheets-Sheet 2 nau m a m a 0 lnvenlors #17 220 dr/Pomels Tfazn 0 692757324 Patented Feb. 27, 193.4

UNITED STATES LOCKED NUT Arthur James Romeis and John Otis Gangstad, Chippewa Falls, Wis.

Application July 12, 1932. Serial No. 622,134

1 Claim.

The present invention relates to locked nuts and has for some of its objects to provide, in a manner as hereinafter set forth, a device of this character which will be simple in construction, strong, durable, eflicient and reliable in use and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:--

Figure 1 is a plan view of a locked nut assembly in accordance with the present invention, showing the elements in position on a bolt and ready to be tightened.

Figure 2 is a view in side elevation thereof.

Figure 3 is a plan view showing the elements after the same have been tightened.

Figure 4 is a view in side elevation, showing the elements after having been tightened.

Figure 5 is a plan view of the sectional nut.

Figure 6 is a view in side elevation of the sectional nut.

Figure '7 s aview in side elevation of the sectional nut, taken at right angles to Figure 6.

Figure 8 is a plan view of one of the sections of the sectional nut.

Figure 9 is a view in side elevation of one of the sections of the sectional nut.

Figure 10 is a plan view of the lock washer.

Referring now to the drawings in detail, it will be seen that the embodiment of the present invention which has been illustrated comprises a nut which is designated generally by the reference numeral 1, said nut including duplicate, complemental lower and upper sections 2 and 3, respectively, having aligned, substantially oval openings 4 therein for the reception of the threaded portion 5 of a bolt 6.

Alternate side portions of the opposed faces of the sections 2 and 3 are recessed, as at 7, to provide coacting inclined shoulders constituting cams 8 which are engageable with each other. In the side of the opening 4 of each section 2 and 3 which is remote from the cam 8 is a series of teeth 9, said teeth being adapted to bite into the threads 5 of the bolt 6.

The reference numeral 10 designates a lock washer which is mounted on the bolt 6 in engagement with the upper section 3 of the sectional nut 1. The lock washer 10 is provided with a circular opening 11 for the reception of the bolt 6. Bendable tongues lzproject from the lock washer 10 for a purpose which will be presently set forth.

Threadedly mounted on the outer portion of the bolt 6 for engagement with the lock washer 10 is a nut 13 of conventional construction. The 0 nut 13 is polygonal and preferably square. The sections 2 and 3 of the sectional nut 1 are also preferably square.

In assembling the invention, the sections 2 and 3 of the sectional nut 1 are slipped on the threaded portion 5 of the bolt 6 and assume the position shown to advantage in Figure 2 of the drawings, the inner section being engaged with the object or body (not shown) in which said bolt is mounted. The openings 4 are of sufficient size to permit the teeth 9 of the sections 2 and 3 to pass over the threads 5 of the bolt. Then, the lock washer 10 is slipped on the bolt and engaged with the upper section 3 of the sectional nut 1. The nut 13 is then threaded on the bolt 6 and 1 constitutes means for forcing the section 2 toward the section 3. As the sections 2 and 3 are thus forced together, the cams 8 cause said sections to simultaneously move laterally in opposite directions in a manner to imbed the teeth 9 in the threads 5 of the bolt 6. After the nut 13 has been thus tightened, certain of the tongues 12 of the lock washer 10 are bent into engagement with the sectional nut 1 and the other tongues of said lock washer 10 are bent into engagement with the adjacent sides of said nut 13, thus positively locking the nuts 1 and 13 together against relative rotary movement. It will thus be seen that all of the elements are secured together as a unit. This unit is positively prevented from rotating on the bolt 6 by reason of the fact that the teeth 9 are embedded in the threads 5 of said bolt 6.

It is believed that the many advantages of a lock nut constructed in accordance with the present invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:-

A device of the class described comprising a pair of locking elements, each having an oblong opening passing therethrough and each element having a group of radial teeth on an end wall of its opening, said teeth extending axially, the abutting faces of said elements each being formed with a high part and a low part, with an no inclined shoulder connecting the parts together, lateral movement of the two elements in opposite said shoulders sloping in the same direction and directions to cause the teeth to enter portions of forming coacting cam surfaces, said shoulders the threads of the bolt, a nut threaded on the being diametrically arranged and extending at bolt for forcing the elements together and against 5 rightangles to the major diameter of the opena work piece. so

ing, whereby when the two elements are forced ARTHUR JAMES ROMEIS. together on a bolt, the shoulders will produce JOHN OTIS GANGSTAD.

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